8 MB - POWERLAB

Functionsand characteristicsMicrologic control units 0Micrologic H "harmonics"DB101523DB101522DB101521Display of harmonics up to 21th order.Waveform capture.Log.With the communication optionAdditional measurements, maximeters and minimetersCertain measured or calculated values are only accessible with the COMcommunication option:b I peak / 2 (I 1 + I 2 + I 3)/3, I unbalanceb load level in % Irb power factor (total and per phase)b voltage and current THDb K factors of currents and average K factorb crest factors of currents and voltagesb all the fundamentals per phaseb fundamental current and voltage phase displacementb distortion power and distortion factor phase by phaseb amplitude and displacement of current and voltage harmonics 3 to 31.The maximeters and minimeters are available only via the COM option for use witha supervisor.Waveform captureThe Micrologic H control unit stores the last 4 cycles of each instantaneous currentor voltage measurement. On request or automatically on programmed events, thecontrol unit stores the waveforms. The waveforms may be displayed in the form ofoscillograms by a supervisor via the COM option. Definition is 64 points per cycle.Pre-defined analogue alarms (1 to 53)Each alarm can be compared to user-set high and low thresholds. Overrun of athreshold generates an alarm. An alarm or combinations of alarms can be linked toprogrammable action such as selective recording of measurements in a log,waveform capture, etc.Event log and maintenance registersThe Micrologic H offers the same event log and maintenance register functions asthe Micrologic P. In addition, it produces a log of the minimums and maximums foreach "real-time" value.Additional technical characteristicsSetting the display languageSystem messages may be displayed in six different languages. The desiredlanguage is selected via the keypad.Protection functionsAll current-based protection functions require no auxiliary source. Voltage-basedprotection functions are connected to AC power via a voltage measurement inputbuilt into the circuit breaker.Measurement functionsMeasurement functions are independent of the protection functions.The high-accuracy measurement module operates independently of the protectionmodule, while remaining synchronised with protection events.Measurement-calculation modeAn analogue calculation function dedicated to measurements enhances theaccuracy of harmonic calculations and the power-quality indicators. The MicrologicH control unit calculates electrical magnitudes using 1.5 x In dynamics (20 x In forMicrologic P).Measurement functions implement the new "zero blind time" conceptEnergies are calculated on the basis of the instantaneous power values, in thetraditional and signed modes.Harmonic components are calculated using the discrete Fourier transform (DFT).Accuracy of measurements (including sensors)b voltage (V) 0.5 %b current (A) 1.5 %b frequency (Hz) 0.1 %b power (W) and energy (Wh) 2 %b total harmonic distortion 1 %Stored informationThe fine-setting adjustments, the last 100 events and the maintenance registerremain in the control-unit memory even when power is lost.Time-stampingTime-stamping is activated as soon as time is set manually or by a supervisor noexternal power supply module is required (max. drift of 1 hour per year).ResetAn individual reset, via the keypad or remotely, acts on alarms, minimum andmaximum data, peak values, the counters and the indicators.31